The Prophet’s (ص) Companion in Paradise

On the authority of Ibn Marduyeh: The Messenger of Allah (ص) said:

فِي الْـجَنَّةِ دَرَجَةٌ تُدْعَی ﴿ الْوَسِيلَة ﴾ فَإِذَا سَأَلْتُمُ اللهَ فَاسْأَلُوا لِيَ الْوَسِيلَةَ

قَالوُا: يَا رَسُولَ اللهِ، مَنْ يَسْكُنُ مَعَكَ فِيها؟

قَالَ: ﴿ عَلِيٌّ وَفَاطِمَةُ وَالْـحَسَنُ وَالْـحُسَيْنُ ﴾

“In Heaven there is a level and rank called “Wasilah”, so when you ask Allah for something for me, then ask Allah to grant me the Wasilah.” They (those who were present) asked: O Messenger of Allah, who will reside there in your company?
He said: "Ali, Fatimah, Al-Hasan, and Al-Husain."